Using particle accelerators to collide gold nuclei at nearly the speed of light, physicists can create matter as hot and dense as the Universe was a millionth of a second after the Big Bang. For this reason, the collisions are sometimes called "little bangs.''

The matter created in these little bangs has been found to behave like a liquid. If a liquid-like quark-gluon plasma exists in these collisions then acoustic waves should be able to propagate through that matter. We look for evidence of acoustic phenomena and use available data to determine the sound of the little bangs. The acoustic picture we present is what an observer inside the quark-gluon plasma would hear as the system expands and cools.

Our analysis of the frequency spectrum from momentum correlations is analogous to the analysis of the Cosmic Microwave Background. In this site we present our analysis of the sound of the little bangs